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using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
namespace AdvancedInspector
{
/// <summary>
/// ScriptableObject are not serializable within the scope of a GameObject.
/// Therefore, they are improper to prefab, copy and so on.
/// This class' goal is to provide a polymorphic solution and give an easy way of handling up front.
///
/// Derived from Object; no polymorphism supported.
/// Derived from ScriptableObject; cannot be prefabed, copied, duplicated or instanced.
/// Derived from MonoBehaviour; can only live on a GameObject.
///
/// A ComponentMonoBehaviour is created from another MonoBehaviour; its parent.
/// A parent can be another ComponentMonoBehaviour.
/// If the parent is destroyed, the subcomponent is destroyed too.
/// If a subcomponent is found without a parent, it's destroyed too.
/// </summary>
[AdvancedInspector]
public abstract class ComponentMonoBehaviour : MonoBehaviour
{
[SerializeField]
private MonoBehaviour owner;
/// <summary>
/// The owner of a "subcomponent".
/// Use to know if this component lost its parent.
/// If so, the AdvancedInspector will delete any unused component.
/// </summary>
public MonoBehaviour Owner
{
get { return owner; }
set
{
if (value != null)
owner = value;
}
}
/// <summary>
/// A subcomponent is not visible the normal way in the Inspector.
/// It's shown as being part of another item.
/// </summary>
protected virtual void Reset()
{
hideFlags = HideFlags.HideInInspector;
}
/// <summary>
/// Called when the inspector is about to destroy this one.
/// Loop in all the internal and destroy sub-components.
/// </summary>
public void Erase()
{
foreach (FieldInfo info in GetFields(GetType(), false))
{
object value = info.GetValue(this);
if (value is ComponentMonoBehaviour)
{
ComponentMonoBehaviour component = value as ComponentMonoBehaviour;
if (component.Owner == Owner)
component.Erase();
}
}
DestroyImmediate(this, true);
}
/// <summary>
/// Instanciate an existing Component on the same owner GameObject
/// </summary>
public ComponentMonoBehaviour Instantiate()
{
return Instantiate(gameObject, Owner);
}
/// <summary>
/// Instanciate an existing Component on the same owner GameObject but with a new onwer.
/// </summary>
public ComponentMonoBehaviour Instantiate(MonoBehaviour owner)
{
return Instantiate(gameObject, owner);
}
/// <summary>
/// Instanciate an existing Component on the target GameObject.
/// </summary>
public ComponentMonoBehaviour Instantiate(GameObject go, MonoBehaviour owner)
{
return CopyObject(go, owner, this) as ComponentMonoBehaviour;
}
private static object CopyObject(GameObject go, MonoBehaviour owner, object original)
{
if (original == null)
return null;
Type type = original.GetType();
if (type == typeof(string))
return ((string)original).Clone();
else if (type.Namespace == "System")
return original;
else if (typeof(IList).IsAssignableFrom(type))
return CopyList(go, owner, (IList)original);
else if (typeof(ComponentMonoBehaviour).IsAssignableFrom(type) && ((ComponentMonoBehaviour)original).Owner == owner)
return CopyComponent(go, owner, (ComponentMonoBehaviour)original);
else if (typeof(Component).IsAssignableFrom(type))
return original;
else if (typeof(ScriptableObject).IsAssignableFrom(type))
return ScriptableObject.Instantiate((ScriptableObject)original);
else if (typeof(UnityEngine.Object).IsAssignableFrom(type))
return original;
else if (type.IsClass)
return CopyClass(go, owner, original);
else
return original;
}
private static IList CopyList(GameObject go, MonoBehaviour owner, IList original)
{
Type type = original.GetType();
IList copy;
if (type.IsArray)
{
copy = Array.CreateInstance(type.GetElementType(), original.Count);
for (int i = 0; i < original.Count; i++)
copy[i] = CopyObject(go, owner, original[i]);
}
else
{
copy = Activator.CreateInstance(type) as IList;
for (int i = 0; i < original.Count; i++)
copy.Add(CopyObject(go, owner, original[i]));
}
return copy;
}
private static ComponentMonoBehaviour CopyComponent(GameObject go, MonoBehaviour owner, ComponentMonoBehaviour original)
{
Type type = original.GetType();
ComponentMonoBehaviour copy = go.AddComponent(original.GetType()) as ComponentMonoBehaviour;
foreach (FieldInfo info in GetFields(type, false))
{
if (info.IsLiteral)
continue;
info.SetValue(copy, CopyObject(go, copy, info.GetValue(original)));
}
copy.Owner = owner;
return copy;
}
private static object CopyClass(GameObject go, MonoBehaviour owner, object original)
{
Type type = original.GetType();
object copy = Activator.CreateInstance(type);
foreach (FieldInfo info in GetFields(type, false))
{
if (info.IsLiteral)
continue;
info.SetValue(copy, CopyObject(go, owner, info.GetValue(original)));
}
return copy;
}
private static List<FieldInfo> GetFields(Type type, bool recursive)
{
List<FieldInfo> infos;
if (recursive)
infos = type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance).ToList();
else
infos = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy).ToList();
if (type.BaseType != null && type.BaseType != typeof(object))
infos.AddRange(GetFields(type.BaseType, true));
return infos;
}
}
}
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